Granted Patent
Utility
US 5,677,644 · App. 08/469,679
Ramp generating structure for producing color graphics
Inventors:
Kia Silverbrook, James Robert Metcalf
Patented Case
View Patent ↗
Granted: Oct 14, 1997
Filed: Jun 6, 1995
Inventors
Kia Silverbrook
James Robert Metcalf
Assignees (at issue)
CANON KABUSHIKI KAISHA
Canon Information Systems Research Australia Pty. Ltd.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.